Don't return wall clock times when time isn't ticking.

media/renderers/audio_renderer_impl.cc

Index: media/renderers/audio_renderer_impl.cc
diff --git a/media/renderers/audio_renderer_impl.cc b/media/renderers/audio_renderer_impl.cc
index d17a0689134d6075491a70e18b66fb5d0d63a9a6..fe439e25b4edbc2baadd629bd759f8770d5fef82 100644
--- a/media/renderers/audio_renderer_impl.cc
+++ b/media/renderers/audio_renderer_impl.cc
@@ -170,8 +170,10 @@ bool AudioRendererImpl::GetWallClockTimes(
     const std::vector<base::TimeDelta>& media_timestamps,
     std::vector<base::TimeTicks>* wall_clock_times) {
   base::AutoLock auto_lock(lock_);
-  if (last_render_ticks_.is_null() || !playback_rate_)
+  if (last_render_ticks_.is_null() || !playback_rate_ ||
+      buffering_state_ != BUFFERING_HAVE_ENOUGH || !sink_playing_) {
     return false;
+  }
 
   DCHECK(wall_clock_times->empty());
   wall_clock_times->reserve(media_timestamps.size());